baby boom echo
: a secondary baby boom that occurs when the children of a baby boom have children of their own : baby boomlet Construction spiked at the same time as a giant wave of 20-somethings—another wrinkle unique to Utah, a baby boom echo long after the rest of the country's—entered the worlds of work, housing and family.— Kirk Johnson, New York Times, 24 Feb. 2008 First Known Use of baby boom echo
1977, in the meaning defined above
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